Mental health refers to a harmonious state in which the human body, mind and society are in harmony with each other, which has the following characteristics: Normal intelligence Normal intelligence is the most basic psychological condition for people to live, study, work and labor. Emotional stability and cheerfulness Emotional stability and cheerfulness are important signs of mental health. If someone is often sad, discouraged and desperate, and moody, it is a sign of mental unhealthiness. Behavior Harmonization A mentally healthy person’s behavior is governed by consciousness and reason, and his or her thoughts and behavior are harmonized and have self-control. If someone’s behavior and thoughts contradict each other, his or her thinking is fragmented, his or her actions are disorganized, and his or her behavior is bizarre, he or she is mentally unhealthy. Good interpersonal relationship Friendly with others, helpful and good at communication can reflect the state of mental health of a person. Good adaptability In a big world with many changes and complicated situations, if a person keeps flexible thinking, adapts to the situation and has good adaptability, this is also one of the signs of mental health.